Hi,
The replica installation is failing when the replica attempts to contact
the CA on the master to log into the security domain. According to your
log, this is https://ipa01.ix.test.com:9445
Can the master be resolved and reached from the replica? Can port 9445
be reached (as well as ports 9444 and 9443?)
You can also check the master's /var/log/pki-ca/debug log to see if any
communication was received from the replica.

There was an additional DNS A record added to the existing IPA server
hostname! This additional DNS A record pointed at the IP address of the
replica IPA server I'm attempting to configure! I removed this A record
and the replica installed successfully.

When I initially ran the ipa-replica-prepare command, I added the
"--ip-address" option to get the DNS records for this host created. (I
have a seperate dns domain for the IPA environment.) In this process
ipa-replica-prepare created an additional reverse zone on the server.
(The new ipa replica resides on a subnet which sits at a AD DNS server,
but it's still resolvable from the IPA dns servers).

After the replica finished I tried to run the ipa-replica-prepare
command again with a new hostname, and adding an IP address using
--ip-address on a subnet not known to the IPA DNS. The same error was
re-produced, the DNS A record was added to the master IPA server.

I would also like to note that I cannot see the second DNS entry using
the web gui, only using "ipa dnsrecord-find". Bug opened in bugzilla for
ipa-replica-prepare: